Log-loading jack



W. A. ARCHIBALD LOG LOADING JACK.

APPLICATION FILED' mmzs, 1922.

msmw, Patented Oct. 3,1922.

Whitnqyflvfrckihqld, INVENTOR.

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LQGi-LOADING- Application filed March 23, 1922. Serial No. 546,000.

T cZZ whom it may concern:

Be it known that I, lVi-irrrnir ll. iii-2on1;- BALD, a citizen of the United States, and a resident of Bellingham, in the county oi? l ihatcom. and State of l ashington, have invented a new and use; 11 hog-Loading Jack, oi which the following is a specif lvl y invention reiatesto im gn-oi ients in log loadingecho, the kind which are mounted on a guy cable of uspar tree over the car to be loaded, andcne of the objects oi my improvements is to provide a loading j ack which will not injure th e cable on which it is mounted. Another obcct of m int provements is to provide loadin jack which will automatically clamp itself "fast to the cable on which it is mounted by the weight of the loads which it must bear. Another object oi improvements is to provide loading jack which can be unclaniped trom its cable by one While on the ground; and a further object of my improvements is to provide a loading jack which can be readily set in another position on the same cable or moved to another cable.

I attain these objects by the mechanism illustrated in the sheet of drawings accompanying this specification oi which forms a part and in which Figure l a side ele vation. of my loading jack, and Fig. 2 is an end elevation of Fig. 1.

Similar characters refer to similar parts throughout. Certain parts are broken away to show other pa rts hidden thereby.

More particularly: Two similar side plates 8, 3 are clamped together by bolt 4-, two bolts S'andrtour bolts 6. Clamp bloc-l: 7 housed in channel bar 8 which, together with said block is fastened between the upper edges of plates 3 by bolts 6 which pass through both said channel and said block. it.

cove c is provided in the bottom of bio it 7 for seating the cable on which theljack is to be mounted. A lower clamping block 9 is housed. in channel bar 10. Two bolts 11 pass through transverse holes in said oh annel and block and the bolt ends are mounted in slots 12 in plates 3 in a mannerpermitting the free movement for a limited distance of block 9 with channel :bar toward and from. block 7. but not endwise of said block;

neither can block 5) move in channel l0. Groove a lengthwise in block 9 is junta posed to groove 07 and bears on the lower side of the cable on which the jltfil; L mount ed. 'lwo hinge ears, (4 only one oi which is shown, provide a bearing for hinge pin 13 on which is mounted for oscillation cam bars Said cam bars each has a curved cai'n channel 15, each eccentric to one of axle bolts 18 Each cam bar 14 has in its outer end a stop screw .16, only one oi which i hown, which bears on the back of channel bar ll) to adjust the neai'ness with which cam bar may approach the same. i o clamping; arms or levers 1?, 17 are mounted for oscillation on axle bolts l8, 18 in plates Each of said clamping arms has "-ounted in a fork on its upper end a roller l9 on pin 20 adapted to roll in groove 15. Each of proximate lugs 21, 21 on the upper ends of arms 17 has a conical hole in which is soldered one end of release cable 22. Cable 22 is pendent from. said lugs, is folded at a and clamped to form said told by screw bolt clznnpsv The upper ends of cable 22 are crossedcausing the cable to pass downward on either side of sheave 2% which is mounted tor rotation on tube (L Tube of bears on both of plates 8 and is clamped be.- tween said plates by bolt t therethrough. In the lower end of each of clamping arms 17 is a hole in which is engagedone of shackles 25. ll ith each of said shackles 25 is eng one ot the end links 26 of a chain he inn" two other links 2? between which is bull ring 28. -Each oftwo eyes 29 has a cross shank c having a longitudinal holetherethrough which is mounted on one 0;? thelower con'icrs oi": the ack l one of clamping bolts 5. l

in o

j acks is guy on ,les of cl incl bar E; with cl. l; nutuug the lower clamp brought up beneath the guy cable. lVith said cable block 9 block 7 and channel S are replaced between plates 3 bolts 6 replaced as before. ie uy cables which maintain the spar tree are usually inclined with the ground an oi or Beneath some of these gu road passes. d a car is spott l beneath one oi aid g cables and on this guy the loading incl: is counted. The to be placed on the car are delivered alongside of the same lw t donkey.

il ith d on the proper 110 as block having; a oohrough; is

tened to bull ring 28 and said ring is lashed to loop a with a rope, then a hand line, which has been passed through a lead block fastened to the top of the spar tree, is connected to the uppermost of eyes 29 and with said hand line the jack and. loading block hauled up said guy to a point vertically above said car when said hand line is made fast, retainingthe jack in place. Then a man is drawn up to the aclr on the loading cable and he unfastens the rope which fastens ring 28 to loop a, thus allowing the weight of said loading block to all bear on the lower ends of arms arms to force rollers 19 apart and along cam channels 15 thus forcing channel 10 and block 9 upward to bear on the guy able. clamping the same between blocks 7 and 9. The man is returned to the car and the loading cable is fastened to a log and the same is lifted with power applied to said cable by the donkey drum around which it is wound. The weight of the log is sufficient to clamp the jack securely to the guy cable and said hand line can be unfastened Iii which causes Said cars spotted beneath said acl: may continue till it is more convenient toload the logs from near another guy cable. Then the jack is removed by first hitching to it the said hand line and making the same fast. Then a manis hauled up to the jack and fastens the end of a cable from one of the donke drums to loop 05 and the donkey applies force to said cable causing rollers 19 to approach each other and unclamp block 9. The man then lashes loop (0 and ring 28 together with a rope and the weight of the loading block on cable 22 causes the cable clamp to remain free from the guy cable. The hand line is used to lower jack, block and man to the ground down the guy. Once on the ground the jack is released from the guy by removing bolts 6 and block and channel 7 and S as before. Then said jack is removed from said guy cable and taken to that guy cable under \rhich it is preferred to have the cars spotted for the 'i'fin'ther loading of logs thereon. Then the jack is mounted in place on the guy cable as before.

I prefer to use hard wood for clamp blocks 7 and 9. This will not injure the guy cables.

7 When desired, the eccentricity of cam channels 15 can be changed relative to axles 18 by adjusting with screws 16.

The usual loading jack is a two-wheeled carriage.

lization due to the great pressures localized on them by contact with said wheels.

Having thus disclosed my invention, what I claim is new and desire to secure by Letters Patent is,

1. In a log loading ack in comblnation, a ack housing, a cable-clamp member fixed It has been found that the guycables are caused to be weakened by crystalto said housin a cable-clamp member slid ably engaged with. said housing adapted to coact with said fixed-clamp member to clamp on a cable between them, and a pair of levers fulcrumed in said housing one end of each of which bears on said movable clamp member adapted to force it into closer proximity to said fined clamp member when turned on its fulcrum in one direction and the other end of each of which is connectible to a log the weight of which turns said one end in said one direction.

2. In a log loading jack in combination, a jack housing, a cable-clamp n amber lined to said housing, a cable-clamp member slidably engaged with said housing adapted to coact with said fixed clamp member to clamp on a cable between them, a cam-channel member adjustably connected to said slidable clamp member, means adapted to vary the distance between said cam-channel member and said slidable clamp member, and a pair of levers fulcrhmed in said housing one end of each of which bears on said canrchannel member adapted to force said slidable clamp member into closer proximity to said fixed clamp member when turned on'its fulcrum in one direction and the other end, of each of which is connectible to a log the weight of which turn v said one end in said "one direction.

3. In a log loading jack in combination, a jack housing, a cable-clamp member lined to said housing, a cableclamp member slidably engaged with said housing adapted to coact with said fixed clamp member to clamp on a cable between them, and a pair of levers fulcrumed in said housing on one end of each of which is mounted a roller for revolution adapted to bear on said slidable clamp member to force it into closer proximity to said fixed clamp member when said one end is turned on its fulcrum in one direction and the other end of each of which is connectible to a leg the \veight of which turns said one end in said one direction.

4:. In a log loading jack in conibination, a jack housing, a cable-clamp member fixed to said housing, a cable-clamp member slidably engaged with said housing adapted to coact with said fixed clamp member to clamp on a cable between them, a cam-channel member adjustably connected to said slidable clamp member, means adapted to vary the distance between said cam-channel member and said slidable clamp member, and a pair of levers fulcrumed in said housing on one end of each of which is mounted a roller for revolution adapted to roll in the channel of said cai'n-chai'inel member and force said slidable clamp member in close" proximity to said fixed clamp member when said one end is turned on its fulcrum in one direction and the other end of each of which is connectible to a log the weight of which turns said one end ot each of said levers in said one direction.

5. In a log loading jack in combination, a jack housing, a cable-clan'ip member fixed to said housing, a cable-clamp member slidably engaged with said housing adapted to coact with said fixed clamp member to clamp on a cable between them, a pair of levers fulcrumed in said housing one end of each of which bears on said slidable clamp member adapted to force it into closer proximity to said fixed clamp member When turned on its fulcrum in one direction and the other end of each of which is connectible to a log the weight ot which turns said one end in said one direction, and a tension member fastened to said one end of each of said fnlerumed levers adapted for connection to power means whereby said one end of each of said levers is revolved in the other direction.

6. In a log loading jack in combination, a jack housing, a cable-clamp member fixed to said housing, a cable-clamp member slidably engaged With said housing adapted to coact with said fined clamp member to clamp on a cable between them, a cam-channel member adjustably connected to said slidable clamp member, means adapted to var Y the distance between said cam-channel member and said slidable clamp member, a pair of levers fulcrumed in sald housing on one end of each of which is mounted a roller for revolution adapted to roll in the channel of said camchannel member and force said slidable clamp member in closer proximity to said fixed clamp member when said one end of each of said levers is turned on its fulcrum in one direction and the other end of Which. connectible to a log the Weight of Which turns said one end of each of said levers in said one direc ion, and a tension member fastened to said one end of each of said levers adapted for connection to power means whereby said one end of each of said levers is revolved in the other direction.

WHITNEY A. ARCHIBALD. 

